<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
	</head>
	<body>
	</body>
	<script type="text/javascript">
	    var arr = ["A","B","C","D","E","F","G"];
//	    splice(start，length，覆盖和插入)
		arr.splice(3,2,"斑马","骆驼"); 
		console.log(arr)
	</script>
</html>
